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J. Cent. South Univ. (2018) 25: 2664-2676 DOI: https://doi.org/10.1007/s11771-018-3944-z Path planning for UAVs formation reconfiguration based on Dubins trajectory CHEN Qing-yang(陈清阳)1, LU Ya-fei... for example, a path planning method based on Dubins trajectory and particle swarm optimization (PSO) algorithm is presented in this paper. The mathematic model of multiple UAVs formation reconfiguration......
J. Cent. South Univ. (2019) 26: 3045-3056 DOI: https://doi.org/10.1007/s11771-019-4235-z Crack evolution behavior of rocks under confining pressures and its propagation model before peak stress ZUO... University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract: The understanding of crack propagation characteristics and law of rocks during the loading process is of great......
FATIGUE CRACK PROPAGATION OF Ni-BASE SUPERALLOYS L.Z.Ma1,E.Barbero1,X.B.Liu1,K.M.Chang1 (1.Dept. of Mechanical & Aerospace Engineering, West Virginia University, Morgantown,WV 26506-6106, USA) Abstract:Time-dependent Fatigue Crack Propagation (FCP) behaviors of five Ni-base superalloys were investigated at various temperatures under fatigue with various holding times and sustained loading......
, stress concentrations, weld defects, and the crack growth path [7-9]. As a result, theoretical parameters must be treated as random variables affected by a number of influencing factors, which increases... J. Cent. South Univ. (2021) 28: 58-71 DOI: https://doi.org/10.1007/s11771-021-4586-0 Corrosion fatigue crack growth mechanisms in welded joints of marine steel structures XU Qian(徐倩), SHAO Fei(邵飞......
J. Cent. South Univ. (2012) 19: 2534-2540 DOI: 10.1007/s11771-012-1307-8 Distribution network planning based on shortest path LU Zhi-ying(路志英), GAO Shan(高山), YAO Li(姚丽) Department... for distribution network routing, an automatic routing method of distribution network planning was proposed based on the shortest path. The problem of automatic routing was divided into two steps in the method......
J. Cent. South Univ. (2019) 26: 2418-2431 DOI: https://doi.org/10.1007/s11771-019-4184-6 Demodulation spectrum analysis for multi-fault diagnosis of rolling bearing via chirplet path pursuit LIU... interpretation. As such, we propose a demodulation spectrum analysis method for multi-fault bearing detection via chirplet path pursuit. First, the envelope signal is obtained by applying Hilbert transform......
crack growth behavior of fatigue tested L-specimen at σa=110 MPa: (a) Crack growth rate; (b) Small crack growth path; (c) Fracture surface Fig.6 Fatigue crack growth behavior of fatigue tested T-specimen at σa=110 MPa: (a) Crack growth rate; (b) Small crack growth path; (c) Fracture surface show the fatigue crack path profiles of the specimen surface. The white arrow shows the crack initiation......
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Crack spacing threshold of double cracks propagation for large-module rackZHAO Tie-zhu(赵铁柱), SHI Duan-wei(石端伟), YAO Zhe-hao(姚哲皓), MAO Hong-yong(毛宏勇), CHENG Shu-xiao(程术潇), PENG Hui(彭惠) (School... inclusions and surface cracks. To ensure its safety in the future service, studying on crack propagation rule and the residual life estimation method of large-module rack is of great significance......
. 3.3.2 裂纹演化 图8 PFC3D模拟试验裂纹演化 Fig. 8 Crack evolution in PFC3D simulation test 图8所示为σ30=5 MPa,σ10=20 MPa时不同中间主应力PFC3D模拟试验裂纹演化图.由图8(a)和图8(b)可知:在不同应力路径下,剪切裂纹数与拉伸裂纹数均随ε1增大而增大,且中间主应力σ2越大,破坏前相同应变ε1下各类裂纹数量......